毕业设计外文翻译---自动变速器换挡规律的研究

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1、毕业论文(设计)外文翻译机械工程学院机械制造及其自动化专业(本科)2008级机制二班课题名称：某变速箱上盖零件大批生产的工艺工装设计毕业论文(设计)起止时间：2012年03月05日～05月25日(共12周)学生姓名：学号：2008111204指导教师：报告日期：2012.03.17THERESEARCHSOFAMTSHIFTINGSCHEDULESVehicularAutomaticTransmissioncanbedividedintothreetypes:AutomaticTransmission(AT),AutomatedMecha

2、nicalTransmission(AMT)andContinuouslyVariableTransmission(CVT).AMThasbecomeakindoftransmissionthatisfullofpotentiality,duetoitshightransferefficiency,lowcostandeasinesstomanufacture.TheresearchonAMTshiftingperformanceiskeytechnologyinthedeveloping.Shiftingperformancedirec

3、tlyinfluencethemarketcompetitionandindustrializationofAMT.AMThasgoodmarketexpectation,butduringtheshiftingprocedure,thepowermustbecutoffwhichcausesthepoorshiftingperformancethanATandCVT.Onlythroughimprovingtheshiftingperformancecanthecommercialcompetencebeestablished.Soth

4、evirtualimportantthingistofindthewaytoimproveshiftingperformance.ThedevelopmentofAMTcanbedividedintothreephases:semi-automatic,automaticandintelligent.ThetwomajorpartofAMTare:thehardwareincludingthemasteredobject,executor,sensorsandTCU;andthesoftwareperformingthecontrolst

5、rategy.TheperformanceofATshiftinfluencesgreatlytheperformanceofthevehicle.SotheresearchonatshiftqualityisanimportantprobleminthedomainofATresearching.ShiftqualitycontrolofATisaccomplishedbyelectronicandhydraulicsystem.Toshiftsmoothly,accordingtherealtimethrottlevalveopeni

6、ngandvehiclespeedsignal,thecontrollersendselectronicsignalstocontroloilpressurechangingcurveoftheapplyingelements.thispaperanalyzesandresearchdetailedshiftqualitycontrolsystem，theanalyzingmodelofshiftingprocessandpressurechangingcurveoftheapplyingelementsFirstlythispapers

7、ummarizestheexistingevaluatedquotaofshiftquality,andfullyanalyzesandintroducestheexistingcontrolmannerofATshiftquality.Tomeettheneedsofresearchofvehiclestartingandtherealtimecontrolofshift,thispaperputsforwardasimplifiedmodelofengine-torqueandadynamicsmodelofATshiftingpro

8、cess.Throughtheapplyingoftheestablishedmodel,thispaperfullyanalyzestheprocessoftheATshifting.Thi